/*
 * Copyright 2016-2019 yoara
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package yhao.infra.feature.tidb.mybatis.dialect;

import yhao.infra.service.datasource.mybatis.dialect.Dialect;

/**
 * tidb 分页实现
 *
 * @author yoara
 */
public class TidbDialect extends Dialect {
    public boolean supportsLimitOffset() {
        return true;
    }

    public boolean supportsLimit() {
        return true;
    }

    public String getPageString(String sql, int offset, int limit) {
        if (offset > 0) {
            StringBuilder sqlBuilder = new StringBuilder(sql.length() + 120);
            return sqlBuilder.append(sql).append(" limit ").append(offset)
                    .append(",").append(limit).toString();
        } else {
            StringBuilder sqlBuilder = new StringBuilder(sql.length() + 120);
            return sqlBuilder.append(sql).append(" limit ").append(limit).toString();
        }
    }
}
